US7011568B2 - Grinder with adjustable tool rest - Google Patents

Grinder with adjustable tool rest Download PDF

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Publication number
US7011568B2
US7011568B2 US10/870,013 US87001304A US7011568B2 US 7011568 B2 US7011568 B2 US 7011568B2 US 87001304 A US87001304 A US 87001304A US 7011568 B2 US7011568 B2 US 7011568B2
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United States
Prior art keywords
grinding wheel
tool rest
base
tool
grinding
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
US10/870,013
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US20050026550A1 (en
Inventor
Roger Lynn Sorrell
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Individual
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Individual
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Publication date
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Priority to US10/870,013 priority Critical patent/US7011568B2/en
Publication of US20050026550A1 publication Critical patent/US20050026550A1/en
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Publication of US7011568B2 publication Critical patent/US7011568B2/en
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Expired - Fee Related legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B49/00—Measuring or gauging equipment for controlling the feed movement of the grinding tool or work; Arrangements of indicating or measuring equipment, e.g. for indicating the start of the grinding operation
    • B24B49/18—Measuring or gauging equipment for controlling the feed movement of the grinding tool or work; Arrangements of indicating or measuring equipment, e.g. for indicating the start of the grinding operation taking regard of the presence of dressing tools
    • B24B49/183—Wear compensation without the presence of dressing tools
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B41/00—Component parts such as frames, beds, carriages, headstocks
    • B24B41/06—Work supports, e.g. adjustable steadies

Definitions

  • the invention relates to a grinder with an adjustable tool rest to maintain a relatively constant distance between the tool rest and the grinding wheel as the grinding wheel wears down.
  • FIG. 1 is a side elevational view of a grinding wheel according to a first embodiment.
  • FIG. 2 is a side elevational view of a grinding wheel according to a second embodiment.
  • FIG. 3 is an end view of the grinding wheel in the second embodiment.
  • FIGS. 1–3 show a grinder 10 according to a various embodiments of the invention.
  • the grinder 10 comprises a base 12 , a grinding wheel 14 rotatably mounted to the base 12 , and a motor 15 for rotating the grinding wheel 14 .
  • the motor 15 may drive the grinding wheel 14 directly. Alternatively, the driving force may be transmitted from the motor 15 to the grinding wheel 14 via a drive train.
  • the particular manner of supporting and driving the grinding wheel 14 is not a material aspect of the invention.
  • a tool rest 16 is movably mounted to the base 12 .
  • the function of the tool rest 16 is to support a tool, such as a chisel, or other work piece while grinding.
  • the invention comprises a mechanism for maintaining the spacing between the tool rest 16 and the grinding wheel 14 as the grinding wheel 14 wears down. Various mechanisms for maintaining the spacing between the tool rest and the grinding wheel are described.
  • the tool rest 16 comprises an angularly-adjustable resting plate 18 pivotably mounted to the upper end of a vertical support member 20 .
  • the vertical support member 20 is pivotably mounted at its lower end to the base 12 .
  • a guide roller 22 is mounted to an intermediate portion of the vertical support 20 and is adapted to engage the outer edge of the grinding wheel 14 .
  • a spring or other biasing member 24 applies a biasing force to the tool rest 16 to move the tool rest toward the grinding wheel 14 until the guide roller 22 engages the grinding wheel 14 .
  • One end of the spring 24 connects to the vertical support and the other end of the spring 24 connects to a spring arm 26 attached to the base 12 .
  • the spring 24 holds the guide roller 22 in contact with the grinding wheel 14 as the grinding wheel 14 wears down, thereby maintaining the spacing between the tool rest 16 and the grinding wheel 14 .
  • an optical detector 30 is used to detect the outer circumference of the grinding wheel 14 .
  • the optical detector 30 may comprise a single beam or multiple beams of light.
  • a microprocessor 32 and servo motor 34 adjust the position of the tool rest 16 based on the output signal from the optical detector.
  • the servo-motor 34 drives a shaft 36 that connects to the vertical support 20 .
  • the invention may be modified in various ways.
  • the tool rest could be mounted for linear movement, rather than rotational movement as shown in FIGS. 1 and 2 .
  • detectors other than optical detectors could be used to detect the outer circumference of the grinding wheel. Such variations are within the scope of my invention.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Constituent Portions Of Griding Lathes, Driving, Sensing And Control (AREA)

Abstract

A grinding tool with a toll rest includes an adjustment mechanism to adjust the position of the tool rest responsive to wear of the grinding wheel.

Description

RELATED APPLICATIONS
This application claims priority under 35 U.S.C. § 119(e) from the following provisional application: U.S. Provisional Application Ser. No. 60/480,463 filed on Jun. 20, 2003. That application is incorporated in its entirety by reference herein.
SUMMARY OF THE INVENTION
The invention relates to a grinder with an adjustable tool rest to maintain a relatively constant distance between the tool rest and the grinding wheel as the grinding wheel wears down.
BRIEF DESCRIPTION OF THE DRAWINGS
FIG. 1 is a side elevational view of a grinding wheel according to a first embodiment.
FIG. 2 is a side elevational view of a grinding wheel according to a second embodiment.
FIG. 3 is an end view of the grinding wheel in the second embodiment.
 DETAILED DESCRIPTION OF THE INVENTION
FIGS. 1–3 show a grinder 10 according to a various embodiments of the invention. The grinder 10 comprises a base 12, a grinding wheel 14 rotatably mounted to the base 12, and a motor 15 for rotating the grinding wheel 14. The motor 15 may drive the grinding wheel 14 directly. Alternatively, the driving force may be transmitted from the motor 15 to the grinding wheel 14 via a drive train. The particular manner of supporting and driving the grinding wheel 14 is not a material aspect of the invention.
A tool rest 16 is movably mounted to the base 12. The function of the tool rest 16 is to support a tool, such as a chisel, or other work piece while grinding. In broad terms, the invention comprises a mechanism for maintaining the spacing between the tool rest 16 and the grinding wheel 14 as the grinding wheel 14 wears down. Various mechanisms for maintaining the spacing between the tool rest and the grinding wheel are described.
In the embodiment shown in FIG. 1, the tool rest 16 comprises an angularly-adjustable resting plate 18 pivotably mounted to the upper end of a vertical support member 20. The vertical support member 20 is pivotably mounted at its lower end to the base 12. A guide roller 22 is mounted to an intermediate portion of the vertical support 20 and is adapted to engage the outer edge of the grinding wheel 14. A spring or other biasing member 24 applies a biasing force to the tool rest 16 to move the tool rest toward the grinding wheel 14 until the guide roller 22 engages the grinding wheel 14. One end of the spring 24 connects to the vertical support and the other end of the spring 24 connects to a spring arm 26 attached to the base 12. The spring 24 holds the guide roller 22 in contact with the grinding wheel 14 as the grinding wheel 14 wears down, thereby maintaining the spacing between the tool rest 16 and the grinding wheel 14.
In an alternate embodiment shown in FIG. 2, an optical detector 30 is used to detect the outer circumference of the grinding wheel 14. The optical detector 30 may comprise a single beam or multiple beams of light. A microprocessor 32 and servo motor 34 adjust the position of the tool rest 16 based on the output signal from the optical detector. The servo-motor 34 drives a shaft 36 that connects to the vertical support 20.
Other elements of my invention which may be used with either embodiment include an adjustment mechanism for adjusting the tension on the biasing spring 24, and an anti-kickback device 28 to prevent the tool rest from kicking back when an object gets caught in the gap between the tool rest and grinding wheel. A safety mechanism could also be provided to shut off power to the grinding wheel 14 when kickback is detected.
Those skilled in the art will recognize that the invention may be modified in various ways. For example, the tool rest could be mounted for linear movement, rather than rotational movement as shown in FIGS. 1 and 2. Also, in the second embodiment, detectors other than optical detectors could be used to detect the outer circumference of the grinding wheel. Such variations are within the scope of my invention.

Claims (4)

1. A grinding tool comprising:
a base;
a grinding wheel rotatably mounted to the base;
a tool rest movably connected to the base;
means to adjust the position of the tool rest responsive to wear of the grinding wheel.
2. A grinding tool comprising:
a base;
a grinding wheel rotatably mounted to the base;
a tool rest movably connected to the base; and
a guide roller connected to the tool rest;
a biasing member biasing the tool rest such that the guide roller contacts the grinding wheel.
3. A grinding tool comprising:
a base;
a grinding wheel rotatably mounted to the base;
a tool rest movably connected to the base; and
an optical detector to detect the circumference of the grinding wheel;
a servo-motor to adjust the position of the tool rest responsive to the detection of the grinding wheel by the optical detector.
4. A grinding tool comprising:
a base;
a grinding wheel rotatably mounted to the base;
a tool rest movably connected to the base;
an adjustment mechanism to adjust the position of the tool rest responsive to wear of the grinding wheel.
US10/870,013 2003-06-20 2004-06-17 Grinder with adjustable tool rest Expired - Fee Related US7011568B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US10/870,013 US7011568B2 (en) 2003-06-20 2004-06-17 Grinder with adjustable tool rest

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US48046303P 2003-06-20 2003-06-20
US10/870,013 US7011568B2 (en) 2003-06-20 2004-06-17 Grinder with adjustable tool rest

Publications (2)

Publication Number Publication Date
US20050026550A1 US20050026550A1 (en) 2005-02-03
US7011568B2 true US7011568B2 (en) 2006-03-14

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
US10/870,013 Expired - Fee Related US7011568B2 (en) 2003-06-20 2004-06-17 Grinder with adjustable tool rest

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US (1) US7011568B2 (en)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6364750B2 (en) * 2000-01-03 2002-04-02 Magna-Matic Corporation Blade sharpener for curved and straight edge blades
US6383057B1 (en) * 1993-07-30 2002-05-07 Unova Uk Ltd. Environmental conditioning of workpieces

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6383057B1 (en) * 1993-07-30 2002-05-07 Unova Uk Ltd. Environmental conditioning of workpieces
US6364750B2 (en) * 2000-01-03 2002-04-02 Magna-Matic Corporation Blade sharpener for curved and straight edge blades
US6368196B1 (en) * 2000-01-03 2002-04-09 Magna-Matic Corporation Blade sharpener for curved and straight edge blades

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Date Code Title Description
REMI Maintenance fee reminder mailed
LAPS Lapse for failure to pay maintenance fees
STCH Information on status: patent discontinuation

Free format text: PATENT EXPIRED DUE TO NONPAYMENT OF MAINTENANCE FEES UNDER 37 CFR 1.362

FP Lapsed due to failure to pay maintenance fee

Effective date: 20100314